ICD-10 Code A18.12 – Tuberculosis of bladder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A18.12 – Tuberculosis of bladder
What it is
A18.12 identifies tuberculosis involving the bladder. Use it when Mycobacterium tuberculosis infection affects the bladder, usually as part of genitourinary tuberculosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include urinary frequency, dysuria, hematuria, or sterile pyuria, but confirm bladder involvement in the record.
When to use this code
Use this code when the provider documents bladder tuberculosis, tuberculous cystitis, or confirmed TB infection of the bladder. It may appear with other genitourinary TB codes if multiple sites are involved. Check documentation for the exact anatomic site and whether disease is active.
Do not use for
Do not use for nonspecific urinary tract infection, cystitis without tuberculosis, or suspected TB without confirmation. Check documentation if the note only mentions renal, ureteral, or prostate involvement.
Coding tip
Verify that the chart links tuberculosis to the bladder specifically before assigning A18.12.